Add a vibration feedback, along with the LED feedback when booting.
This is suggested by TL Lim.
When trying to power up the phone with holding it in the hand, vibration
feedback is more obvious than LED.
Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
Prepare for better device categorization by moving everything to testing
subdir first.
[skip-ci]: chicken-egg problem: passing pmaports CI depends on pmbootstrap MR
depends on this MR
Related: postmarketos#16
Icenowy Zheng